Machine for squart-trimming metal articles.



a. 38mm. MACHINE FOR SQUARE TRIHWING METAL ARTICLES.

APPLICATXON FILED AFR.25-, i912.

Patented. Sfipt. 3, 1918.

3 SHEETSSHEET 3.

'colarnn'r, or BUFFALQ,

earnest.

machine for trimming on? the circular iiasln.

or thin lateral fin of metal which is found at the baseof the squared heads of bolts as turnedout by automatic bolt forging inachines; and although my invention is obviously applicable to other machines for specifically diiferent purposes, I will describe it in connection with the use for which i it was primarily intended.

It is the common practice to do this trimming by passing the bolt heads between rotary trimmers, which may be tWo parallel pairs of rotary shears spaced apart a dis tance just equal to the width of the squared surfaces of the head so that the excess metal is trimmed ofi' flush with thesquared surfaces on two opposite sides of the head or the nut.

The portions of the flash reinaining'on the other two sides of the head are removed in the same Way by the same or a similar set of rotary trimmers.

My present machine comprises tWO successive-sets of the above described parallel pairs of rotary shears, combined with a feeding guide for presenting the bolt heads squarely to the first set for trimming" the'flash from two sides, an intermediate guidewa'y leading to the seoond set of'shears and interposed in said guidew'ay, a turning; mechanism whereby the hall trimmed boltsare given a quarter turn and are then-presented squarely to the second set of shears for trimming the flash from, the remaining sides.

The rotary trimmers rotate in the direction' of 'niovementof the bolts and are arranged so that their trimming engagement with the successive bolts operates to feed them forcibly forward; Thus the first set of rotary shears operates to push a continuous stream of bolts through the guideway to the second set of shears. The forward pressure transmitted through the stream of bolts is utilized as a source of power for operating the mechanism for separating the bolts and giving them the quarter turn Specification of Letters Patent.

Application filed April 25, 1917. Serial NO. 1645550.

ASSIGNUE Till B'UFEEALQ B03135.

NEW YORK, A CORPORATION OF NE-W YURH.

MACHINE non saunas-maintains METAL enriches.

Patented tic-pt 3, liiluttil necessary for presentation oi? the untrimmed flashes to the second set of shears. ranging the guides leading to the fir: shears at a fairly steep inc-line, weigi o1"- the: bolts .inay he utilized for yieldingly pressing a continuous supply of the bolts to the first. set of shears. This results in a machine in which a continuous teeding". separating and turning of the bolts is automatically maintained with only the shears as the source of power and only the stream of bolts as the means for applyingthe power for both purposes. The operation is automatica'ily self-regulating to speed and it {is automatically self-stopping in of sticking or jamming of any one oi the bolts anywhere in the guidevvay or turning mechanism.

The turning mechanism ;comprises two star wheels provided with suitable p-rojeo tions and arranged one in advance of the other. in operative relation to the guidevvey for successive engagement with the bolts passingtherein. The one first'engaged by the bolts feeds them' forward at approni mately the rate of movement of the whole train whereas the second one feeds them forward at a considerably faster rate thereby spacing apart each bolt from the one which precedes it, so that the corners and uncut portions of the flash are freed so as to per mit of the turning operation. This is accomplished by arranging an abrupt deflection in one of the two lateral engage the square faces of the bolt heads and correspondingly relieving;- the other lat eral guide so that there is room for the bolt head to turn about said obstruction pivot. The forward feeding of the bolt by the starflwheel through this portion of the guidewav gives it the required quarter turn,

immediately 111001143116 completioniot which, i

guides which at l v the star Wheel advances it into a portion of the guideway Where .the lateral guides are again parallel and prevent further turning of the squared head. Q

' The automatic operation of the starwheels at the. speeds required for successively accelerating the feed of each bolt so as to separate it from its predecessor, equires that the second star wheel have a higher peripheral speed than the first and preferably they are geared together so that the differ-- ence in the rate'of speed and the resulting ice . v amount of separation of the bolts will be constant. 'The preferred way is to provide the same number .of bolt engaging projections on both star wheels and gear them together so that they will rotate at the same aiugular speed, but have the (liai'mter of the second wheel considerably greats than that of the'first wheel so that its pe. pheral velocity and the resulting speed 4 feed will be higher than that of the first Thus ar ranged, the first star wheel wil be rotated by the pressure of the stream of its forced forward to it by the first set oJ hears and whatever its speed, the second :tar Wheel which is geared thereto will be 'lVQll at a higher periphm'al velocity, the carrying the pinch of the two pairs of shears forward at increased speed, eacl i-olt as delivcred to it by the first staifwhez- It is simpler to have the star heels e11 gage the shanks of the bolts rather than the heads The heads are spiare ant re crowded close together by the feeding, pressure from the rear, whereas the shanks are cy-' lindical and are spaced apart by the heads so that they are well adapted both for initial engagement and for smooth sliding and rolling emit-act with the star wheel projection The details of my invention will be more readily understood from the following detailed description of a desirable embodiment of. my invention illustrated in the accompanying drawings, in which Figure 1. is a top plan view;

Fig. 2 is a vertical longitudinal section;

Fig. 3 is a vertical section of the bolt turning lnechanism taken on the line 3 -3, Fig. 1;

Figs. 4: and 5 are respective side and plan views of the bolts before trimming; v

Fig". (3 is a plan view of the bolt trimmed on two sides only; and

Fig. '7 is a plan view of the bolt trimmed on all four sides. I

lily reference to the drawings, particularly' Figs. l to i", it will be seen that the bolts to be trimmed comprise the cylindrical shank or barrel 0,, the square head 5, and at the base of the head, the circular flash (r, c, at, 0?. Figs. 4 and 5 show these parts in side elevation and plan while Fig. 6 shows the head after the portions of the hash 0, #3

have been trimmed off in the first set'o'lfv trimmed oil.

teatime? lapped substantially in the plane of the squared surface of the bolt. The upper shear plates 5 preferably extend to that plane from the outside and the lower shear plates 6 from the inside so that the faces of the plates ('3 form guides for the bolt shanks while their peripheries form feeding supports for the solid part of the bolt head both before and after theflash has been The diameter of the shear plates is relatively large and their overlap relatively slight and hence the shearing edges converge at a small angle which causes them to nip the flashes and feed them along as fast as they come within range.

The details of construction, relative arrangement, adjustment and positive driving of rotary shears for this class of heavy metal work are not shown in the drawings because they are all" well known in the art and, so far as concerns disclosure ofmy present invention, it need only be stated that their locations and relative arrangements are as above described and that they are all posi-.

tively' driven at the same speed by suitable power in the direction indicated by. the arrows on Fig. 2.

The guideway comprises a two part bedplate comprising the members 7, 8" spaced apart to form a slot 9. The bolts hang by their heads fi'om 7 and 8 with their shanks projecting through the slot 9.' The lateml guide plates 10, 11 are spaced from each other a distance slightly greater than the width of the squared portion of the head of.

the bolt; also from the bottom guides 7 and 8, a distance sufficient to permit free sliding ofthe circular flashes on the bolt heads even when overlapped as shown in the drawings.

The mechanism for separating and turning the bolts in the portion of the guideway between the'two sets of shears comprises the small star wheel 12 and the large star wheel 13, each with the same number of boltengaging recesses, mounted on parallel vertical shafts l t. 15. These star wheels engage the barrel of the bolt only. The shafts 14, 15

. v i i 1 'tlflll'iITlQIS-l and the portions d, d remainingw/ are oi: su'thcient length to allow for the longtrance end of the machine and the. pairs 3 and being the set at the exit end of the machine. Th iairs l and .2 are preferably opposite and parallel and rotated at the same speed sothat the lateral component wi est bolt to be trimmed and at their lower ends are provided with meshing gears 16, 1'? having the same number of teeth, so that the starwheels rotate attire same angular speed. The bolt engaging recesses 18 on star wheel 12 and 19 on star wheel 13 are equal in number and come into registering rela tion for the feeding of the bolt shanks from 12 to 13. The periphery of the larger star wheel 13 however, is greater t an the periphery of star wheel 12 and hence bolts will be carried forward at higher speed as soon guideway adj aoent I word by gravity toward arness as they are delivered to the larger one.

At a point opposite the star Wheel 18 the lateral guide 11 is slightly offset as at 29 and notched as at :21, While the lateral guide on the side nearest the star Wheel is correspondingly cut away to afi'ord room for the 1 bolt around the offset 20.-

turning of the The shanlr of the bolt is of laterally by the slot 9 but as guiding means for steadying the head. of the bolt during the turning movement, I provide a dog 22 pivoted at 23 and provided! with a depending pr esser-foot 24 adapted to contact laterally with the bolt heads. The dog is yieldingly pressed into contact with the bolt heads in the guideway by a spring spiraled about the bolt 26 and having one free end confined by a pin 27 and the other engaging; a pin 28 on the dog.- The play of-the dog is limited by a bo1t25 in slot 29. A fixed possible upward movement of the heads of the bolts is arranged over the portion of the the turning mechanism.

In the above device, the inclined section of the uide is kept supplied With a continuous stream of untrimmed bolts, held square by the lateral guides 10, 11 and pressed fori the first set of trim-- ming shearsl, 2-. As fast as their flashescome within reach, they are nipped, lay-the shears, trimmed on tWosides and oositively forced forward. This pushes the bolt course guided an add1tional against the flash of the next bolt ahead of it.

This pressure transmitted forward through the train of bolts, pushes the foremostbolt into one of the recesses 18 of the small star Wheel 12 thereby forcing it to revolve. This motion transmitted through the shaft 14, gears l6, l7 andslrait drives the larger star Wheel 13 at the same angular speed. The recesses 19 in the register with the recesses in the smaller Wheel so to engage the shank of the bolt just as it is leaving the recess of the smaller Wheel. The peripheral speed Wheel being; greater carries the bolt forward out of engagement with the following belt which is still held in the smaller star Wheel- 12. The action of the rear face of the recess 192m the round body of thebolt While moving it forward in the guideway tends to revolve it and to crowd it against-and along the opposite side oi? the guideway=where the obstruction and notch 21 acting-as a turning fulcrum, cause the bolt to make a quarter turn. Thereupon, the square head of the bolt passes between the parallel portion of the side guides 10, 11, whiohguide the bolt heads squarely to the second set of trimming shears. The bolts are successively forced into this sectionof the guideway by the star Wheel 13 so-that a continuous stream of them is forcedrorward at the same rate as the from the smaller wheel top guide 39 for limiting of the head,

pairs so as to large star Wheel. 13

of the large in a direction off the bolts along said guideway by pressure the first set of trimming shears'and Will be suificient to overcome the feeding power of the shears and hold the bolts stationary While the shears rotate idly.

While I have described with great particularity a desirable embodiment of my invention, it will be obvious that various changes, modifications and substitutions of parts as, Well as changes in the locations and relative arrangement of parts may be made Without departing from the spirit of my invention, as defined by the appended claims.

claim: 4 1. In a machine for trimming the parallel sides of square headed bolts, a guideway having centrally slotted bottom guides for sun porting the bolts by bodies depending through the slot and lat eral guides adapted to engage parallel/sides and successive sets of. 1' my trimmers along said gnideway arranged in posits sides of successive bolts, and rotated in a direction to force a continuous stream of the bolts along said guideway by pressure from the rear, in combination with means between said sets of trimmers for giving said bolts a quarter turn about their longitudinal axes, said means comprising an offset or obstruction formed in one of the lateral guides, a corresponding cut away portion in the opposite lateral guide, a star wheel for engaging'each boltand-forcing it forward past said offset or. obstruction with one corner of the squared head in turning engagement therewith and meansjor driving said star wheel at a' peripheral speed higher than the speed at Whichsaid' stream of bolts is normally forced along the guide- Way.

2, In a machinej or trimming the parallel sides of square headed bolts, a guideway having centrally slotted bottom guides for supporting the bolts by the heads with their bodies depending through the slot and lateral guides adapted to engage parallel sides of the head, and successive sets of rotary trimmers along said guideway arranged in pairs so as to operate simultaneously on 0pposite sides of successive bolts, and rotated to force a continuous stream the heads with their" operate simultaneously on opthe first set star wlieel'at a peripheral speed higher than v at which said stream of articles is normally forced along the guideway, said means comprising a star wheel pro ecting into the path of and actuated by the moving stream of bolts and a driving connection therefrom'to said. first mentioned star wheel.

3. In annechanism for turning articles the speed 0 hayingparallel sided heads and bodies of less diameter than the heads, a guideway comprising base guides adapted to engage the under sides of the heads of the articles with thebodies thereof dependingbetween them and lateral guides for engaging parallel sides for the heads of tile articles,

,means for feeding acontinuous stream of the articles along said guideway by pressure from the rear, in combination with means for turning said articles comprising an. offset or obstruction formed in one of the lateral guides, at corresponding cut away portion in the opposite lateral guide, a star Wheel for engaging the body portion of each article and forcing it forward past said offset or obstruction with the head, of the article in turning engagement therewith. and means for driving said star wheel at a higher rate of speed than that .at which said-stream of articles is normally forced along the guideway.

4. In a mechanism for turning articles having parallel sided heads and bodies of less diameter than-the heads, a guideway comprising base guides adapted to engage the under sides of the heads of the articles with the bodies thereof depending between them and lateral guides for engaging parallel sidesof the heads of the articles, means for feeding a continuous stream of the articles along said guideway by pressure from the rear, in combination with means for turning said articles, comprising an offset or obstruction formed in one of the lateral guides, a corresponding cut away portion .in the opposite lateral guide, a star wheel for engaging the body portions of each article and forcing it forward past said offset or obstruction with the head of the article in turning engagen'ient therewith, and means for driving said star wheel at a highcrgrate of speed than that at. which said 'strean'i of articles is normally forced along the guideway, said means comprising a star wheel projectinginto the path of and engaging parallel sides of the heads of I n L- of tie stream, said. mechanism comp can tarmac actuated by the body portions ot the artic as they are forced forward along s id gandeway, and a driving connection theretroi'n to said first mentioned wheel.

5. In a mechanism for turning; articles having parallel sided heads and body portions' of less diameter than the heads, a guideway comprising base guides adapted to engage the under sides of the heads at the articles with the bodies thereof depend '7 ing between them and lateral guides for en gaging parallel sides of the heads of the articles, means for feeding a continuous stlean'i of the articles along said guidewzrv by pressure from the rear, in combination with means for turning said articles, cone prising an otfset or obstruction formed in one of the lateral guides, a corresponding cut away portion in the opposite la guide, a star wheel for engaging the articles and forcing them forward past said oii'set or obstruction in turning engagement there with and means for driving said star whe l at a higher rate of speed than that at wl'iich said stream of articles is normally forced along the guideway.

(3. In a mechanism having vparallel sided tions of less diameter guideway comprising base to engage the under sides of the beam the articles with the bodies thereof dept ing between them and lateral gnides i for turning articles heads and body porthan the head-s, guides are and articles, means for feeding a contnn stream of the articles along said guide by pressure from the rear, in combi i n with means for turning said articles. com-- prising an offset or obstruction formed in one of the lateral guides, a corresponding cut away portion in the opposite lateral guide, a star wheel for engaging the a cles and forcing them forward past said ottset or obstruction in turning en?" "en'rut therewith and means for driving ii a wheel at a higher rate of speed at which said. stream of articles nor):

forced along the guidewaysaid means comprising a star wheel projecting into the path of and actuated by e moiiug i-i tffll'n 1L.

articles and a driving connection tn "was to said first mentioned star whee 7. In a acliine of the class des'c d guideway, means for forcing tttit')? stream of articles along said guidei l )IPSSHI'B from the rear in combn'iation means for accelerating the forward 1' ment of one of the articles in the an to s ace it apart irom the precedi ar a rotor adapted to be rotated by the tor-w: movement of said articles and a second adapted to force forward in the guide articles delivered from said first m n on:

rotor, and power transmitting cont stween rotors adopted to drive the second roiaor of, :1 higher peripheral so es/(l than said fires mentioned rotor.

Eli ln s machine of on described, a quid-sway, for forcing a continnons in of along said gnirlewoy by sure from the rear, in combination with mechanism accelerating the forward movement of one oi belts in the guideii-o space it opiirt'froin the preceding of she slareom, mechanism con;- oi'ising a stair Wheel projecting into the path iii-e bolls and adopted; to be driven-by the forward rook omens thereof and, a second sic-.1

i pro ieelino" said gniclewny in oplire relation to register with and. feed l fili'ifil ll the bolls es rliseng ell from said drive-n Wheel, gearing between sairl V said bolt feeding Wheel is i said loolt driven Wheel ot 21 penal speed greater than the." of said riven' ."llEBl. n s

machine for trimming the parallel sirles square headed bolts, 3 guideway :5 Ming slotted bottom gui'cles for itlis bolts by the heads with their. penflin supporting: bodies do n through the slot lateral. guides to engage parallel sicles' of the head, rotary trimming shears 't gnidcwsy, each set trim SlDHllLZiKRGGHE-Sl}? opposirles of the some bolt lies 6. and

"to i *ce continuous stream ofbol'ts along so'rl gnicie'wsy by pressure from the rear, in combination with a mechanism for acceler forward movement one of the in lilla gnirlewziy to spaceit apart from bolt and I01 giving it a quor- Qnrn on longitudinal oXis,sn-irl spac- .rning mechanism comprising an e51 or obstruction formed in one of the guides, 11 yielding presserioot on srlgn the opposite laieralguicle, a star lgrojeciiing in tne path of the bodies of boll-s in advance ofsnicl obstruction and gl d to be driven by the forward RIIOVQ- 1. s said stream of bolts, and a seconcl 'Wlli'il projecting into the poll; of the v s in operative relation to register ocly of each bolt iii? becomes disssirl driven Wheel and thereby boliyforwerd past said ollset or with one corner of its sqnnrcrl 1 nent therewith, and heels whereby said i is rotated by seicl boll" driven s peripheral speerl greater itlion i: o soicl boll driven Wheel.

a inncliine for trimming the pars} siclee square articles, a gniclews l1lV- l :nides for supporting tlie zrruiguides adapted to engage sirles, and successive sets of 1:0-

v along said gnideway on es lo ogerale simulte I sides oi square articles.

neouslgr on opposite sides oil successive articles and rotated in a direction to ilf-orce a continnons stream of the orii-icles 'zilong said goidewziy 'bypressure from. the "rear, in con1- binetion Wifili mea-ns'bctwecn .soicl sets of trimmers for giving 'sziiol articles a quarter turn about their axles, said means comprih ing an offset or obstruction formed in one of the lateral guides, 21 corresponding; cut away portion in the opposite lateral guide, a son Wheel for engaging; each article-and: forcing it forward past said oil'sct or 0bstrnction with one corner in turning engage- .oieni". therewith and means for driving said slnr Wheel at n peripheral speed higher than so the speed oi; which said stream of articles is normally forceiil along 'i-lle guidemiy.

1L a, mechanism for turning articles liming parallel sides, a gniclewoy comprislmse guides later-Lil guides for engaging parallel sides of the articles, means for feeding continuous stream of the srticles along said gnidewny :by pressure from the rear, in combination with means for turning said articles, comprising; an ollsei: 90 or obstruction formed in one of the lateral guides, s c 'esponoing cut away portion in tile opposi'ie ,lni rsl guide, 21 Still Wheel for engaging the body llOfiilUliS of and lore" ii; forward past sziiclo .Si?l010l3- 95 strnci-ion in turning engzigenieni; therewith, and. means for drivingsaid star Wheel at n higher rate of eeil than 'laliat' at which said stream of article is normally force cl ail one, the gniilewnyi In a.- ineclisnism for havingparallel sides, a gnidewziy comprising a base and lateral guides for engaging parallel sirles of the -i ticlss, means for feeding a continuous sfiream of the articles 105 along said gniclewsy by pressure from the rear, in combination with means for turning comprising an offset or obi I turning; articles strnotion formed in one of a corresponding cut away portion in the opposite lateral guide, n star Wheel for engaging the articles and forcing them for Ward past said offset or obstruction in turning engagement therewith and means for driving ssirl stei Wheel at a higher role of speed 13min that in" which said sl'renin of'nrticles is norn'nilly forced along the gniilewny, said means comprising ostar wheel-projecting into the path of and actuated by the moving stream of articles and a driving" connection therefrom to said first mentioned star Wheel.

13 In omechine fortrin'nning the parallel n guidewoy having to engage parallel sides oi the slides, (no successive sets of rotary 'trin'nning shears splice-cl apart along said guideivny, each set orrai'lged to trim sininlmneonsly the ooposiie parallel sides of? the some srlxioles 1 to force them in Er lateral nirles eclaotecl .7 e .t

fit

continuous stream along said guideway by pressure from the rear, in combination with a mechanism for accelerating the forward movement of one of the articles in the guideway to space it apart from the preceding article and for giving it a quarter turn, said spacing and turning mechanism comprising an otlset or obstruction formed in one of the lateral guides, a yielding p1resser-1to t arranged in the opposite lateral guide, a star wheel projecting in the path of the articles in advance of said obstruction and adapted to be driven by the forward movement of said stream o't articles, and a second star wheel projecting into the path of the l articles in operative relation to register with each article as it becomes disengaged from said driven wheel and thereby to feed the article forward past said otlset or obstruction with one corner in turning engagement therewith, and gearing between said wheels whereby said feeding wheel is rotated by said driven wheel at. a peripheral speed greater than that of saiddriven wheel.

14. In a machine for trimming the parallel sides of square articles, a guideway having lateral guides adapted to engage parallel sides of the articles, two successive sets of rotary trimming shears spaced apartalong said guideway, each set arranged to trim' simultaneously the opposite parallel sides of the same articles and to force them in a continuous stream along said guideway by pressure from the rear, in combination with automatic mechanism for accelerating the forward moven'ient of one of the articles in the gu-ideway to space it apart from the preceding article and i'or giving it a'quarter turn.

15. In a machine for trimming the parallel sides of square articles, a guideway having lateral guides adapted to engage parallel sides of the articles, two successive sets cl rotary trimming shears spaced apart along said guideway, each set arranged to trim simultaneously the opposite parallel.

guideway to spaceit apart from the pre ceding article and for giving it a quarter turn.

16. In a metal working machine, spaced apart means for performing successive operations err-metal articles having flat surfaces and corners, in combination with an intermediate guideway for. guiding and turning said articles to present them to the second operating means for working at a different angle from the first means, said guideway comprising portionsnarrow enough to prevent turning of the article and, in alinement therewith, an interi'nediate portion Wide enough to permit turning, said intermediate portion having a stationary detent element arranged in the path of a corner of the forwardly sliding article, whereby the for ward movement of the article turns an ad: jacent flat surface into contact; with the guide, a narrow portion of the guideway being located just beyond said turning element to prevent further turning of the article as it slides forward to the second means for operating thereon.

Signed at North Tonawanda, in the county of Niagara and State of New York, this 23rd day of April, A. D. 1917.

seems r. etasina. 

